GravityLight Home System GL02 Portable Self Powered LED Lamp, 56 Piece

Quite an interesting device! Fill the bag with 28 pounds of something (It comes with paper bags to fill it with sand or rocks, but I used cans of nails and bolts that were in my shed, where I am using the lamp. I do not have electricity in my shed, so I was very glad to have the ability to have light. The light is not very bright, but it does come on a cord that can be moved around and hung where you need it, The cord attaches into the lamp itself. There are actually two cords and two lights but I cannot figure out how to attach them both at the same time so I am guessing that one is supposed to be a replacement. It would be nice if you could use them both at the same time because then you could have two light locations. It takes a fair amount of space for this device because the bag eventually falls all the way to the floor. It is easy to pull the cords, and once pulled they give about 20 minutes of light. Then you just pull them again. Very happy with this.

Review of GravityLight GL02 Home System 1.) It's not for everybody. What it does, it does quite well. Their stated purpose is to reduce dependency on kerosene for task light at night. 2.) Larger than expected. It comes shipped in an 11 x 9 x 6" fiberboard box, well packed. The box comes in at just under 4 pounds. Mine came inside an Amazon box. It would have survived most shipping carriers, including airport baggage handlers. 3.) I could not quickly find a place to hang it high enough in my house to get the claimed 20 minutes of run time. My response to that is 'so what', 12 to 15 minutes is not a problem. It looks like an 8 foot ceiling would be perfect for the GravityLight. 4.) The unit appears to be very well built. Without disassembling the unit, there was nothing which would be a failure point. The cords and beads are quite sturdy, the bag for the weights is exceptionally strong. The company's plastic people did an exceptional job. 5.) The light put out by the unit is, frankly, not what I am used to as a USA city person. About 15 lumen with a color temperature of 5000K and respectable Color Rendering Index of more than 70. It is more than adequate to read by and to do similar tasks in an otherwise dark area. I would not recommend cross-stitching on black aida cloth using this light. 6.) It will not charge a USB device. The nominal output is 2.7 VDC 0.031 A, 0.085 W. It was not meant to charge USB devices, get a solar charger if you need to, this will not do the job, it was not designed for that. It does provide adequate lighting to read and do other tasks. 7.) Pricing - I do not know the actual cost of kerosene in Kenya nor do I know how much lighting a liter of kerosene would provide. I cannot therefore provide a payback time for this unit for replacing kerosene. I can presume that the GravityLight would be infinitely better than the health risk of kerosene. Much better. 8.) Yes, I would buy it again and I would recommend it with caveats to others.

This is a really well made product. It performs just as described. I modified mine to run off of a water wheel and I can get up to six hours with the method I'm using. You can see it at bclifters. I show what two satellite lights look like in my garage. They provide enough light to read and work under and light up a large portion of the garage. Raising and lowering the 20 to 25 pounds to run the Gravity Light is very easy. They have done a great job of designing around the possibility of chains getting tangled. Over all a great product, 20 pounds, at eight feet, for 20 minutes of light is just about right.

It’s an awesome little lighting system, not terribly bright but you can read by it. We were thinking of using it for daily added lighting over a kitchen utility table but it’s not really meant for such frequent use. It’s made well, easy to hang, but wish it was made out of materials that seem sturdier- the ‘chain’ mechanism that operates the light is made from thread and little plastic balls. Might hold up forever but it would be nice to see some real chain or metal cable...

What a fantastic Idea. I purchased one of these for our missionaries to try out on their trip to Turkanaland, Kenya. We had hoped it would provide enough lighting for a family to read by. Here is what our missionary friend said: "I set up the Gravity Light in our dining room at the SEND Center in Turkanaland one late evening to test its effectiveness. It provides just enough light to light a limited area, but not enough for reading. It’d undoubtedly be more light if I waited until it’s dark. I hope the manufacturers can improve on it to produce more light. " They were able to find some solar powered lights that were $35/each. So while this design and the intent is amazing, I'm only giving it 3* for its price point, and the fact that I had hoped it would give off more light. Keep up the amazing work. It is innovative ideas like this that WILL change our world.

I bought this to provide occasional lighting in one room of my old barn, which I use as a garden shed. It provides enough light to see where everything is and get or put away what I need. It was extremely easy to install, and using the 2 included satellite lights instead of the main light allows you to put the light exactly where you need it. My only complaint is that the zip ties included to hang up the main light and bag are useless-- both snapped as soon as any weight was applied. So I tied up the unit with rope instead and that worked fine. For Americans who are used to bright light everywhere, this will seem dim, but having grown up in a house with kerosene lighting I am quite comfortable with the light level for what I need it for. Super convenient with no batteries to replace and no sun to wait for.